<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>pc大转盘抽奖活动页面</title>

	<link href="style.css" rel="stylesheet" type="text/css">

	<script type="text/javascript" src="js/jquery-1.10.2.js"></script>
	<!-- 引入抽奖转盘插件 -->
	<script type="text/javascript" src="js/awardRotate.js"></script>

	<script type="text/javascript">
		var turnplate = {
			restaraunts: [], //大转盘奖品名称
			colors: [], //大转盘奖品区块对应背景颜色
			outsideRadius: 192, //大转盘外圆的半径
			textRadius: 155, //大转盘奖品位置距离圆心的距离
			insideRadius: 68, //大转盘内圆的半径
			startAngle: 0, //开始角度
			randomRate: [], //控制获奖率，百分制(相加需等于100%)，对应restaraunts(顺序需要保持一致)，
			bRotate: false //false:停止;ture:旋转
		};

		$(document).ready(function () {
			//动态添加大转盘的奖品与奖品区域背景颜色
			// turnplate.randomRate = ["100%", '0%', '0%', '0%', '0%', '0%', '0%', '0%', '0%', '0%'];
			// 控制获奖率，百分制(相加需等于100%)，对应restaraunts(顺序需要保持一致)
			turnplate.randomRate = ["50%", '5%', '5%', '5%', '5%', '5%', '5%', '5%', '5%', '10%'];
			turnplate.restaraunts = ["一等奖", "10猫币", "谢谢参与", "5猫币", "10元免费流量包", "20元免费流量包", "20猫币 ", "30元免费流量包", "100元免费流量包",
				"2猫币"
			];
			turnplate.colors = ["#FFF4D6", "#FFFFFF", "#FFF4D6", "#FFFFFF", "#FFF4D6", "#FFFFFF", "#FFF4D6", "#FFFFFF",
				"#FFF4D6", "#FFFFFF"
			];


			var rotateTimeOut = function () {
				$('#wheelcanvas').rotate({
					angle: 0,
					animateTo: 2160,
					duration: 8000,
					callback: function () {
						alert('网络超时，请检查您的网络设置！');
					}
				});
			};

			//旋转转盘 item:奖品位置; txt：提示语;
			var rotateFn = function (item, txt) {
				var angles = item * (360 / turnplate.restaraunts.length) - (360 / (turnplate.restaraunts.length * 2));
				if (angles < 270) {
					angles = 270 - angles;
				} else {
					angles = 360 - angles + 270;
				}
				$('#wheelcanvas').stopRotate();
				$('#wheelcanvas').rotate({
					angle: 0,
					animateTo: angles + 1800,
					duration: 8000,
					callback: function () {
						alert(txt);
						turnplate.bRotate = !turnplate.bRotate;
					}
				});
			};

			// 点击开始抽奖进行转盘旋转抽奖
			$('.pointer').click(function () {
				if (turnplate.bRotate) return;
				turnplate.bRotate = !turnplate.bRotate;
				//获取随机数(奖品个数范围内)
				var item = rnd(turnplate.randomRate);
				//奖品数量等于10,指针落在对应奖品区域的中心角度[252, 216, 180, 144, 108, 72, 36, 360, 324, 288]
				rotateFn(item, turnplate.restaraunts[item - 1]);
			});
		});

		function rnd(rate) {
			var random = Math.floor(Math.random() * 100);
			var myRandom = [];
			var randomList = [];
			var randomParent = [];
			for (var i = 0; i < 100; i++) {
				myRandom.push(parseInt([i]) + 1);
			}
			for (var i = 0; i < rate.length; i++) {
				var temp = [];
				var start = 0;
				var end = 0;
				randomList.push(parseInt(rate[i].split('%')[0]));
				for (var j = 0; j < randomList.length; j++) {
					start += randomList[j - 1] || 0
					end += randomList[j]
				}
				temp = myRandom.slice(start, end);
				randomParent.push(temp)
			}
			for (var i = 0; i < randomParent.length; i++) {
				if ($.inArray(random, randomParent[i]) > 0) {
					return (i + 1)
				}
			}

		}


		//页面所有元素加载完毕后执行drawRouletteWheel()方法对转盘进行渲染
		window.onload = function () {
			drawRouletteWheel();
		};

		function drawRouletteWheel() {
			var canvas = document.getElementById("wheelcanvas");
			if (canvas.getContext) {
				//根据奖品个数计算圆周角度
				var arc = Math.PI / (turnplate.restaraunts.length / 2);
				var ctx = canvas.getContext("2d");
				//在给定矩形内清空一个矩形
				ctx.clearRect(0, 0, 422, 422);
				//strokeStyle 属性设置或返回用于笔触的颜色、渐变或模式  
				ctx.strokeStyle = "#FFBE04";
				//font 属性设置或返回画布上文本内容的当前字体属性
				ctx.font = '16px Microsoft YaHei';
				for (var i = 0; i < turnplate.restaraunts.length; i++) {
					var angle = turnplate.startAngle + i * arc;
					ctx.fillStyle = turnplate.colors[i];
					ctx.beginPath();
					//arc(x,y,r,起始角,结束角,绘制方向) 方法创建弧/曲线（用于创建圆或部分圆）    
					ctx.arc(211, 211, turnplate.outsideRadius, angle, angle + arc, false);
					ctx.arc(211, 211, turnplate.insideRadius, angle + arc, angle, true);
					ctx.stroke();
					ctx.fill();
					//锁画布(为了保存之前的画布状态)
					ctx.save();

					//----绘制奖品开始----
					ctx.fillStyle = "#E5302F";
					var text = turnplate.restaraunts[i];
					var line_height = 17;
					//translate方法重新映射画布上的 (0,0) 位置
					ctx.translate(211 + Math.cos(angle + arc / 2) * turnplate.textRadius, 211 + Math.sin(angle + arc / 2) * turnplate.textRadius);

					//rotate方法旋转当前的绘图
					ctx.rotate(angle + arc / 2 + Math.PI / 2);

					/** 下面代码根据奖品类型、奖品名称长度渲染不同效果，如字体、颜色、图片效果。(具体根据实际情况改变) **/
					if (text.indexOf("M") > 0) { //流量包
						var texts = text.split("M");
						for (var j = 0; j < texts.length; j++) {
							ctx.font = j == 0 ? 'bold 20px Microsoft YaHei' : '16px Microsoft YaHei';
							if (j == 0) {
								ctx.fillText(texts[j] + "M", -ctx.measureText(texts[j] + "M").width / 2, j * line_height);
							} else {
								ctx.fillText(texts[j], -ctx.measureText(texts[j]).width / 2, j * line_height);
							}
						}
					} else if (text.indexOf("M") == -1 && text.length > 6) { //奖品名称长度超过一定范围 
						text = text.substring(0, 6) + "||" + text.substring(6);
						var texts = text.split("||");
						for (var j = 0; j < texts.length; j++) {
							ctx.fillText(texts[j], -ctx.measureText(texts[j]).width / 2, j * line_height);
						}
					} else {
						//在画布上绘制填色的文本。文本的默认颜色是黑色
						//measureText()方法返回包含一个对象，该对象包含以像素计的指定字体宽度
						ctx.fillText(text, -ctx.measureText(text).width / 2, 0);
					}

					//添加对应图标
					if (text.indexOf("猫币") > 0) {
						var img = document.getElementById("shan-img");
						img.onload = function () {
							ctx.drawImage(img, -15, 10);
						};
						ctx.drawImage(img, -15, 10);
					} else if (text.indexOf("谢谢参与") >= 0) {
						var img = document.getElementById("sorry-img");
						img.onload = function () {
							ctx.drawImage(img, -15, 10);
						};
						ctx.drawImage(img, -15, 10);
					}
					//把当前画布返回（调整）到上一个save()状态之前 
					ctx.restore();
					//----绘制奖品结束----
				}
			}
		}
	</script>
</head>

<body style="background:#648233;overflow-x:hidden;">
	<!--抽奖部分  -->
	<img src="images/1.png" id="shan-img" style="display:none;" />
	<img src="images/2.png" id="sorry-img" style="display:none;" />
	<div class="banner">
		<div class="turnplate" style="background-image:url(images/turnplate-bg.png);background-size:100% 100%;margin-top:11%;">
			<canvas class="item" id="wheelcanvas" width="422px" height="422px"></canvas>
			<img class="pointer" src="images/turnplate-pointer.png" />
		</div>
	</div>
	<!-- 返回 pc商城页面 -->
	<a href="/module/novel/type.php?tid=0&page=1&cost=22" class="return"><button>返回商城</button></a>
</body>

</html>